PHP :: Bug #71147 :: opcache.enable=1 leads to crash in zend

Bug #71147	opcache.enable=1 leads to crash in zend_alloc.c
Submitted:	2015-12-17 10:33 UTC	Modified:	2015-12-20 02:46 UTC
From:	ta-sdz at deshammer dot net	Assigned:
Status:	Duplicate	Package:	opcache
PHP Version:	5.6.16	OS:	Linux
Private report:	No	CVE-ID:	None

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From:	ta-sdz at deshammer dot net
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[2015-12-17 10:33 UTC] ta-sdz at deshammer dot net

Description:
------------
When opcache.enable is 1, a segfault (sig11) occures in zend_alloc.c:2075 reproducibly. 

opcache.enable=0 did not throw any of this segfaults.

Tried so far without effect on the bug:
opcache.optimization_level=0xfffffff0
opcache.optimization_level=0xfffffffe

Operating system is CentOS7 using Remis RPMs.

But I'm having similar backtraces as well from Ubuntu 14.04.3 server using ondreys PPA repo.


Full backtrace follows:

#0  _zend_mm_free_int (heap=0x7f6cd84ca480, p=0x7f6cb2935b30) at /usr/src/debug/php-5.6.16/Zend/zend_alloc.c:2075
        mm_block = <optimized out>
        next_block = <optimized out>
        size = <optimized out>
#1  0x00007f6cc82199c7 in zif_accel_chdir (ht=<optimized out>, return_value=<optimized out>, return_value_ptr=<optimized out>, 
    this_ptr=<optimized out>, return_value_used=<optimized out>) at /usr/src/debug/php-5.6.16/ext/opcache/ZendAccelerator.c:162
        cwd = "/daten/www/htdocs/PHP_WEB_APP/admin\000l\177\000\000\005\000\000\000l\177\000\000\001\000\000\000\001\000\000\000?\000\000\000\000\000\000\000\001\000\000\000\000\000\000\000\022\000\000\000l\177\000\000\001\000\000\000l\177\000\000\001\000\000\000\001\000\000\000?\000\000\000\000\000\000\000\004\000\000\000\000\000\000\000\200\377\377\377\000\000\000\000\n\000\000\000l\177\000\000\001\000\000\000\006\000\000\000\b\000\000\000\000\000\000\000\004\000\000\000\000\000\000\000\200\377\377\377\000\000\000\000\n\000\000\000l\177\000\000\001\000\000\000\006\000\000\000\b\000\000\000\000\000\000\000\001\000\000\000\000\000\000\000&5\247\327l\177\000\000"...
#2  0x00007f6cca7f0ecb in dtrace_execute_internal (execute_data_ptr=<optimized out>, fci=<optimized out>, return_value_used=<optimized out>)
    at /usr/src/debug/php-5.6.16/Zend/zend_dtrace.c:97
        lineno = <optimized out>
        filename = <optimized out>
#3  0x00007f6cca8ab318 in zend_do_fcall_common_helper_SPEC (execute_data=<optimized out>) at /usr/src/debug/php-5.6.16/Zend/zend_vm_execute.h:560
        ret = 0x7f6cd7a2f868
        opline = <optimized out>
        should_change_scope = <optimized out>
        fbc = 0x7f6cd8515f70
        num_args = <optimized out>
#4  0x00007f6cca83f4d8 in execute_ex (execute_data=0x7f6cd7a2f8c8) at /usr/src/debug/php-5.6.16/Zend/zend_vm_execute.h:363
        ret = <optimized out>
        original_in_execution = 1 '\001'
#5  0x00007f6cca7f0da9 in dtrace_execute_ex (execute_data=<optimized out>) at /usr/src/debug/php-5.6.16/Zend/zend_dtrace.c:73
        lineno = <optimized out>
        scope = 0x0
        filename = <optimized out>
        funcname = <optimized out>
        classname = <optimized out>
#6  0x00007f6cca7f2b93 in zend_call_function (fci=fci@entry=0x7fff9b4199e0, fci_cache=<optimized out>, fci_cache@entry=0x7fff9b4199b0)
    at /usr/src/debug/php-5.6.16/Zend/zend_execute_API.c:829
        i = <optimized out>
        original_return_value = 0x0
        calling_symbol_table = 0x0
        original_op_array = 0x7f6cd89377b0
        original_opline_ptr = 0x7f6cd7a2c680
        current_scope = 0x0
        current_called_scope = 0x0
        calling_scope = 0x0
        called_scope = 0x0
        current_this = 0x0
        execute_data = {opline = 0x0, function_state = {function = 0x7f6cd892c500, arguments = 0x7f6cd7a2c760}, op_array = 0x0, object = 0x0, 
          symbol_table = 0x0, prev_execute_data = 0x7fff9b419be0, old_error_reporting = 0x0, nested = 0 '\000', original_return_value = 0x0, 
          current_scope = 0x0, current_called_scope = 0x0, current_this = 0x0, fast_ret = 0x0, delayed_exception = 0x0, 
          call_slots = 0x7f6cd7a2c728, call = 0x7f6cd7a2c708}
        fci_cache_local = {initialized = 1 '\001', function_handler = 0x7f6ccabf20e0 <executor_globals+576>, calling_scope = 0x7f6c00000000, 
          called_scope = 0x1ca83f4d8, object_ptr = 0x0}
#7  0x00007f6cca81ac58 in zend_call_method (object_pp=0x0, obj_ce=<optimized out>, fn_proxy=0x7f6cd9078478, 
    function_name=0x7f6cd9078620 "__autoloading", function_name_len=<optimized out>, retval_ptr_ptr=retval_ptr_ptr@entry=0x7fff9b419ab0, 
    param_count=param_count@entry=1, arg1=0x7f6cd91ac340, arg2=arg2@entry=0x0) at /usr/src/debug/php-5.6.16/Zend/zend_interfaces.c:97
        fcic = {initialized = 1 '\001', function_handler = 0x7f6cd892c500, calling_scope = 0x0, called_scope = 0x0, object_ptr = 0x0}
        result = <optimized out>
        fci = {size = 72, function_table = 0x7f6cca83f4d8 <execute_ex+56>, function_name = 0x7fff9b419990, symbol_table = 0x0, 
          retval_ptr_ptr = 0x7fff9b419ab0, param_count = 1, params = 0x7fff9b419980, object_ptr = 0x0, no_separation = 1 '\001'}
        z_fname = {value = {lval = 140735798155680, dval = 6.9532723008769353e-310, str = {val = 0x7fff9b4199a0 "xL\325\330l\177", 
              len = -1887984384}, ht = 0x7fff9b4199a0, obj = {handle = 2604767648, handlers = 0xcc57c1db8f77a500}, ast = 0x7fff9b4199a0}, 
          refcount__gc = 3637857400, type = 108 'l', is_ref__gc = 127 '\177'}
        retval = 0x7f6cd7a2d7e0
        function_table = <optimized out>
        params = {0x7fff9b419968, 0x7fff9b419960}
#8  0x00007f6cca70437a in zif_spl_autoload_call (ht=<optimized out>, return_value=<optimized out>, return_value_ptr=<optimized out>, 
    this_ptr=<optimized out>, return_value_used=<optimized out>) at /usr/src/debug/php-5.6.16/ext/spl/php_spl.c:436
        l_autoload_running = 0
        class_name = 0x7f6cd91ac340
        retval = 0x0
        class_name_len = 11
        func_name = 0x7f6cd9078620 "__autoloading" 
        lc_name = 0x7f6cd8d4cf88 "cshttputils" 
        func_name_len = 14
        dummy = 5
        function_pos = 0x7f6cd90785d8
        alfi = 0x7f6cd9078478
#9  0x00007f6cca7f0ecb in dtrace_execute_internal (execute_data_ptr=<optimized out>, fci=<optimized out>, return_value_used=<optimized out>)
    at /usr/src/debug/php-5.6.16/Zend/zend_dtrace.c:97
        lineno = <optimized out>
        filename = <optimized out>
#10 0x00007f6cca7f2ca4 in zend_call_function (fci=fci@entry=0x7fff9b419d70, fci_cache=fci_cache@entry=0x7fff9b419d40)
    at /usr/src/debug/php-5.6.16/Zend/zend_execute_API.c:849
        call_via_handler = 0
        i = <optimized out>
        original_return_value = <optimized out>
        calling_symbol_table = <optimized out>
        original_op_array = <optimized out>
        original_opline_ptr = <optimized out>
        current_scope = 0x0
        current_called_scope = 0x0
        calling_scope = <optimized out>
        called_scope = 0x0
        current_this = 0x0
        execute_data = {opline = 0x0, function_state = {function = 0x7f6cd84f1810, arguments = 0x7f6cd7a2c750}, op_array = 0x0, object = 0x0, 
          symbol_table = 0x0, prev_execute_data = 0x7f6cd7a2c680, old_error_reporting = 0x0, nested = 0 '\000', original_return_value = 0x0, 
          current_scope = 0x0, current_called_scope = 0x0, current_this = 0x0, fast_ret = 0x0, delayed_exception = 0x0, 
          call_slots = 0x7f6cd7a2c728, call = 0x7f6cd7a2c708}
        fci_cache_local = {initialized = 0 '\000', function_handler = 0x0, calling_scope = 0x0, called_scope = 0x0, object_ptr = 0x0}
#11 0x00007f6cca7f34a2 in zend_lookup_class_ex (name=name@entry=0x7f6cd9193930 "CSHttpUtils", name_length=<optimized out>, key=0x7f6cd91959b0, 
    use_autoload=use_autoload@entry=1, ce=ce@entry=0x7fff9b419e00) at /usr/src/debug/php-5.6.16/Zend/zend_execute_API.c:1005
        args = {0x7fff9b419d10}
        autoload_function = {value = {lval = 140105231415629, dval = 6.9221181645100047e-310, str = {val = 0x7f6cca8cb94d "__autoload", 
              len = 10}, ht = 0x7f6cca8cb94d, obj = {handle = 3398220109, handlers = 0x7f6c0000000a}, ast = 0x7f6cca8cb94d}, 
          refcount__gc = 3401510080, type = 6 '\006', is_ref__gc = 127 '\177'}
        class_name_ptr = 0x7f6cd91ac340
        retval_ptr = 0x7f6cd8d54c18
        retval = <optimized out>
        lc_length = <optimized out>
        lc_name = 0x7f6cd9193a10 "cshttputils" 
        lc_free = <optimized out>
        fcall_info = {size = 72, function_table = 0x7f6cd84cad40, function_name = 0x7fff9b419d20, symbol_table = 0x0,
          retval_ptr_ptr = 0x7fff9b419d18, param_count = 1, params = 0x7fff9b419d00, object_ptr = 0x0, no_separation = 1 '\001'}
        fcall_cache = {initialized = 1 '\001', function_handler = 0x7f6cd84f1810, calling_scope = 0x0, called_scope = 0x0, object_ptr = 0x0}
        dummy = 1 '\001'
        hash = 14980655298215975820
        use_heap = <optimized out>
#12 0x00007f6cca7f3c00 in zend_fetch_class_by_name (class_name=0x7f6cd9193930 "CSHttpUtils", class_name_len=<optimized out>, 
    key=<optimized out>, fetch_type=0) at /usr/src/debug/php-5.6.16/Zend/zend_execute_API.c:1415
        pce = 0x7f6cd91ac340
        use_autoload = 1
#13 0x00007f6cca84e054 in ZEND_INIT_STATIC_METHOD_CALL_SPEC_CONST_CONST_HANDLER (execute_data=0x7f6cd7a2c680)
    at /usr/src/debug/php-5.6.16/Zend/zend_vm_execute.h:3833
        opline = 0x7f6cd9198548
        ce = <optimized out>
        call = 0x7f6cd7a2c728
#14 0x00007f6cca83f4d8 in execute_ex (execute_data=0x7f6cd7a2c680) at /usr/src/debug/php-5.6.16/Zend/zend_vm_execute.h:363
        ret = <optimized out>
        original_in_execution = 1 '\001'
#15 0x00007f6cca7f0da9 in dtrace_execute_ex (execute_data=<optimized out>) at /usr/src/debug/php-5.6.16/Zend/zend_dtrace.c:73
        lineno = <optimized out>
        scope = 0x0
        filename = <optimized out>
        funcname = <optimized out>
        classname = <optimized out>
#16 0x00007f6cca8ab7c9 in zend_do_fcall_common_helper_SPEC (execute_data=<optimized out>) at /usr/src/debug/php-5.6.16/Zend/zend_vm_execute.h:592
        ret = 0x7f6cd7a2be60
        opline = 0x7f6cd903c878
        should_change_scope = <optimized out>
        fbc = 0x7f6cd89377b0
        num_args = <optimized out>
#17 0x00007f6cca83f4d8 in execute_ex (execute_data=0x7f6cd7a2bec0) at /usr/src/debug/php-5.6.16/Zend/zend_vm_execute.h:363
        ret = <optimized out>
        original_in_execution = 1 '\001'
#18 0x00007f6cca7f0da9 in dtrace_execute_ex (execute_data=<optimized out>) at /usr/src/debug/php-5.6.16/Zend/zend_dtrace.c:73
        lineno = <optimized out>
        scope = 0x0
        filename = <optimized out>
        funcname = <optimized out>
        classname = <optimized out>
#19 0x00007f6cca8ab7c9 in zend_do_fcall_common_helper_SPEC (execute_data=<optimized out>) at /usr/src/debug/php-5.6.16/Zend/zend_vm_execute.h:592
        ret = 0x7f6cd7a2bce8
        opline = 0x7f6cd9099070
        should_change_scope = <optimized out>
        fbc = 0x7f6cd8940220
        num_args = <optimized out>
#20 0x00007f6cca83f4d8 in execute_ex (execute_data=0x7f6cd7a2bd08) at /usr/src/debug/php-5.6.16/Zend/zend_vm_execute.h:363
        ret = <optimized out>
        original_in_execution = 1 '\001'
#21 0x00007f6cca7f0da9 in dtrace_execute_ex (execute_data=<optimized out>) at /usr/src/debug/php-5.6.16/Zend/zend_dtrace.c:73
        lineno = <optimized out>
        scope = 0x0
        filename = <optimized out>
        funcname = <optimized out>
        classname = <optimized out>
#22 0x00007f6cca8ab7c9 in zend_do_fcall_common_helper_SPEC (execute_data=<optimized out>) at /usr/src/debug/php-5.6.16/Zend/zend_vm_execute.h:592
        ret = 0x7f6cd7a2bb48
        opline = 0x7f6cd909d450
        should_change_scope = <optimized out>
        fbc = 0x7f6cd9098478
        num_args = <optimized out>
#23 0x00007f6cca83f4d8 in execute_ex (execute_data=0x7f6cd7a2bbe8) at /usr/src/debug/php-5.6.16/Zend/zend_vm_execute.h:363
        ret = <optimized out>
        original_in_execution = 1 '\001'
#24 0x00007f6cca7f0da9 in dtrace_execute_ex (execute_data=<optimized out>) at /usr/src/debug/php-5.6.16/Zend/zend_dtrace.c:73
        lineno = <optimized out>
        scope = 0x0
        filename = <optimized out>
        funcname = <optimized out>
        classname = <optimized out>
#25 0x00007f6cca8ab7c9 in zend_do_fcall_common_helper_SPEC (execute_data=<optimized out>) at /usr/src/debug/php-5.6.16/Zend/zend_vm_execute.h:592
        ret = 0x7f6cd7a2b5a0
        opline = 0x7f6cd900b9a8
        should_change_scope = <optimized out>
        fbc = 0x7f6cd909acc8
        num_args = <optimized out>
#26 0x00007f6cca83f4d8 in execute_ex (execute_data=0x7f6cd7a2b740) at /usr/src/debug/php-5.6.16/Zend/zend_vm_execute.h:363
        ret = <optimized out>
        original_in_execution = 1 '\001'
#27 0x00007f6cca7f0da9 in dtrace_execute_ex (execute_data=<optimized out>) at /usr/src/debug/php-5.6.16/Zend/zend_dtrace.c:73
        lineno = <optimized out>
        scope = 0x0
        filename = <optimized out>
        funcname = <optimized out>
        classname = <optimized out>
#28 0x00007f6cca8ab7c9 in zend_do_fcall_common_helper_SPEC (execute_data=<optimized out>) at /usr/src/debug/php-5.6.16/Zend/zend_vm_execute.h:592
        ret = 0x7f6cd7a29fa8
        opline = 0x7f6cd9091718
        should_change_scope = <optimized out>
        fbc = 0x7f6cd8ff8ba8
        num_args = <optimized out>
#29 0x00007f6cca83f4d8 in execute_ex (execute_data=0x7f6cd7a2a128) at /usr/src/debug/php-5.6.16/Zend/zend_vm_execute.h:363
        ret = <optimized out>
        original_in_execution = 1 '\001'
#30 0x00007f6cca7f0da9 in dtrace_execute_ex (execute_data=<optimized out>) at /usr/src/debug/php-5.6.16/Zend/zend_dtrace.c:73
        lineno = <optimized out>
        scope = 0x0
        filename = <optimized out>
        funcname = <optimized out>
        classname = <optimized out>
#31 0x00007f6cca8ab7c9 in zend_do_fcall_common_helper_SPEC (execute_data=<optimized out>) at /usr/src/debug/php-5.6.16/Zend/zend_vm_execute.h:592
        ret = 0x7f6cd7a29790
        opline = 0x7f6cd90a6d80
        should_change_scope = <optimized out>
        fbc = 0x7f6cd9090268
        num_args = <optimized out>
#32 0x00007f6cca83f4d8 in execute_ex (execute_data=0x7f6cd7a29e50) at /usr/src/debug/php-5.6.16/Zend/zend_vm_execute.h:363
        ret = <optimized out>
        original_in_execution = 1 '\001'
#33 0x00007f6cca7f0da9 in dtrace_execute_ex (execute_data=<optimized out>) at /usr/src/debug/php-5.6.16/Zend/zend_dtrace.c:73
        lineno = <optimized out>
        scope = 0x0
        filename = <optimized out>
        funcname = <optimized out>
        classname = <optimized out>
#34 0x00007f6cca8ab7c9 in zend_do_fcall_common_helper_SPEC (execute_data=<optimized out>) at /usr/src/debug/php-5.6.16/Zend/zend_vm_execute.h:592
        ret = 0x7f6cd7a29160
        opline = 0x7f6cd91745a8
        should_change_scope = <optimized out>
        fbc = 0x7f6cd90a49b8
        num_args = <optimized out>
#35 0x00007f6cca83f4d8 in execute_ex (execute_data=0x7f6cd7a291a0) at /usr/src/debug/php-5.6.16/Zend/zend_vm_execute.h:363
        ret = <optimized out>
        original_in_execution = 1 '\001'
#36 0x00007f6cca7f0da9 in dtrace_execute_ex (execute_data=<optimized out>) at /usr/src/debug/php-5.6.16/Zend/zend_dtrace.c:73
        lineno = <optimized out>
        scope = 0x0
        filename = <optimized out>
        funcname = <optimized out>
        classname = <optimized out>
#37 0x00007f6cca8aa61d in ZEND_INCLUDE_OR_EVAL_SPEC_TMP_HANDLER (execute_data=0x7f6cd7a29070)
    at /usr/src/debug/php-5.6.16/Zend/zend_vm_execute.h:8392
        opline = 0x7f6cd91725a0
        new_op_array = 0x7f6cd919e9a0
        free_op1 = {var = 0x7f6cd7a279d0}
        inc_filename = 0x7f6cd7a279d0
        tmp_inc_filename = <optimized out>
        failure_retval = 0 '\000'
#38 0x00007f6cca83f4d8 in execute_ex (execute_data=0x7f6cd7a29070) at /usr/src/debug/php-5.6.16/Zend/zend_vm_execute.h:363
        ret = <optimized out>
        original_in_execution = 1 '\001'
#39 0x00007f6cca7f0da9 in dtrace_execute_ex (execute_data=<optimized out>) at /usr/src/debug/php-5.6.16/Zend/zend_dtrace.c:73
        lineno = <optimized out>
        scope = 0x0
        filename = <optimized out>
        funcname = <optimized out>
        classname = <optimized out>
#40 0x00007f6cca8aa61d in ZEND_INCLUDE_OR_EVAL_SPEC_TMP_HANDLER (execute_data=0x7f6cd7a271e8)
    at /usr/src/debug/php-5.6.16/Zend/zend_vm_execute.h:8392
        opline = 0x7f6cd7a5da00
        new_op_array = 0x7f6cd7a60638
        free_op1 = {var = 0x7f6cd7a271a8}
        inc_filename = 0x7f6cd7a271a8
        tmp_inc_filename = <optimized out>
        failure_retval = 0 '\000'
#41 0x00007f6cca83f4d8 in execute_ex (execute_data=0x7f6cd7a271e8) at /usr/src/debug/php-5.6.16/Zend/zend_vm_execute.h:363
        ret = <optimized out>
        original_in_execution = 0 '\000'
#42 0x00007f6cca7f0da9 in dtrace_execute_ex (execute_data=<optimized out>) at /usr/src/debug/php-5.6.16/Zend/zend_dtrace.c:73
        lineno = <optimized out>
        scope = 0x0
        filename = <optimized out>
        funcname = <optimized out>
        classname = <optimized out>
#43 0x00007f6cca803e3b in zend_execute_scripts (type=type@entry=8, retval=retval@entry=0x0, file_count=file_count@entry=3)
    at /usr/src/debug/php-5.6.16/Zend/zend.c:1341
        files = {{gp_offset = 40, fp_offset = 32620, overflow_arg_area = 0x7fff9b41ae20, reg_save_area = 0x7fff9b41adb0}}
        i = 1
        file_handle = 0x7fff9b41d0a0
        orig_op_array = 0x0
        orig_retval_ptr_ptr = 0x0
        orig_interactive = 0
#44 0x00007f6cca79f092 in php_execute_script (primary_file=primary_file@entry=0x7fff9b41d0a0) at /usr/src/debug/php-5.6.16/main/main.c:2597
        realfile = "\000\000\000\000l\177\000\000\f\000\000\000\001", '\000' <repeats 11 times>, "\215\222}\312\002\000\000\000\000\000\000\000\377\177\000\000茠\262\001", '\000' <repeats 11 times>, "\225\272{\312\001\000\000\000\200\302A\233\377\177\000\000\230\361\\\331l\177", '\000' <repeats 11 times>, "\245w\217\333\301W\314\000\000\000\000\000\000\000\000\000\245w\217\333\301W\314\000\000\000\000\000\000\000\000\000\245w\217\333\301W\314", '\000' <repeats 24 times>, "\200\301A\233\377\177\000\000\001", '\000' <repeats 15 times>, "\001\000\000\000\000\000\000\000\065ʀ\312l\177\000\000\002\375\000\000\002\000\000\000\240\036\277"...
        __orig_bailout = 0x7fff9b41d120
        __bailout = {{__jmpbuf = {140105466598096, -2324744247055324148, 140105466598096, 140105453897536, 140735798170372, 140105466547584, 
              -2324744248204563444, -2406475686972986356}, __mask_was_saved = 0, __saved_mask = {__val = {140104830283680, 140105234613728, 
                140105479939880, 140104823951672, 140105230659260, 140105479942552, 4294967298, 2, 14724450655460107520, 0, 0, 0,
                140105230659662, 140105479942552, 140105230277298, 0}}}}
        prepend_file_p = <optimized out>
        append_file_p = 0x0
        prepend_file = {type = ZEND_HANDLE_FILENAME, filename = 0x0, opened_path = 0x0, handle = {fd = 0, fp = 0x0, stream = {handle = 0x0, 
              isatty = 0, mmap = {len = 0, pos = 0, map = 0x0, buf = 0x0, old_handle = 0x0, old_closer = 0x0}, reader = 0x0, fsizer = 0x0, 
              closer = 0x0}}, free_filename = 0 '\000'}
        append_file = {type = ZEND_HANDLE_FILENAME, filename = 0x0, opened_path = 0x0, handle = {fd = 0, fp = 0x0, stream = {handle = 0x0, 
              isatty = 0, mmap = {len = 0, pos = 0, map = 0x0, buf = 0x0, old_handle = 0x0, old_closer = 0x0}, reader = 0x0, fsizer = 0x0, 
              closer = 0x0}}, free_filename = 0 '\000'}
        old_cwd = 0x7fff9b41ae30 "/daten/www/htdocs/PHP_WEB_APP/admin" 
        retval = 0
#45 0x00007f6cca8acefd in php_handler (r=<optimized out>) at /usr/src/debug/php-5.6.16/sapi/apache2handler/sapi_apache2.c:667
        zfd = {type = ZEND_HANDLE_MAPPED, filename = 0x7f6cd891e3c0 "/daten/www/htdocs/PHP_WEB_APP/admin/forward.php", opened_path = 0x0, 
          handle = {fd = -677009400, fp = 0x7f6cd7a5a808, stream = {handle = 0x7f6cd7a5a808, isatty = 0, mmap = {len = 3023, pos = 0, map = 0x0, 
                buf = 0x7f6cd7a73000 <Address 0x7f6cd7a73000 out of bounds>, old_handle = 0x0, old_closer = 0x0}, 
              reader = 0x7f6cca7b5fe0 <_php_stream_read>, fsizer = 0x7f6cca79b440 <php_zend_stream_fsizer>, 
              closer = 0x7f6cca79b420 <php_zend_stream_mmap_closer>}}, free_filename = 0 '\000'}
        __orig_bailout = 0x0
        __bailout = {{__jmpbuf = {140105466598096, 2324965642437553164, 140105466598096, 140105453897536, 140735798170372, 140105466547584, 
              -2324744247057421300, -2406475834265801716}, __mask_was_saved = 0, __saved_mask = {__val = {140105466627592, 140105466654984, 
                18446744073048018568, 1, 140105466654984, 0, 18446744069414584320, 140105453897536, 140735798170372, 140105466547584, 
                14724450655460107520, 140105453897536, 140105461943464, 11, 140105466598096, 140105453897536}}}}
        ctx = 0x7f6cd891cfc8
        conf = <optimized out>
        brigade = 0x7f6cd89207c0
        bucket = <optimized out>
        rv = <optimized out>
        parent_req = 0x0
#46 0x00007f6cd7abc010 in ap_run_handler (r=0x7f6cd89152d0) at config.c:169
        pHook = 0x7f6cd84a4cd0
        n = 12
        rv = 0
#47 0x00007f6cd7abc559 in ap_invoke_handler (r=r@entry=0x7f6cd89152d0) at config.c:433
        handler = <optimized out>
        p = <optimized out>
        result = <optimized out>
        old_handler = 0x7f6cd84a03a0 "application/x-httpd-php" 
        ignore = <optimized out>
#48 0x00007f6cd7ad224a in ap_process_async_request (r=r@entry=0x7f6cd89152d0) at http_request.c:338
        access_status = 0
#49 0x00007f6cd7ad2524 in ap_process_request (r=r@entry=0x7f6cd89152d0) at http_request.c:373
        bb = <optimized out>
        b = <optimized out>
        c = 0x7f6cd8908d80
        rv = <optimized out>
#50 0x00007f6cd7ace76e in ap_process_http_sync_connection (c=0x7f6cd8908d80) at http_core.c:210
        keep_alive_timeout = 5000000
        r = 0x7f6cd89152d0
        cs = 0x0
        csd = 0x7f6cd8908b90
        mpm_state = 1
#51 ap_process_http_connection (c=0x7f6cd8908d80) at http_core.c:251
No locals.
#52 0x00007f6cd7ac6120 in ap_run_process_connection (c=0x7f6cd8908d80) at connection.c:41
        pHook = 0x7f6cd84a55a8
        n = 2
        rv = 0
#53 0x00007f6cd7ac6538 in ap_process_connection (c=c@entry=0x7f6cd8908d80, csd=<optimized out>) at connection.c:213
        rc = <optimized out>
#54 0x00007f6cccc7280f in child_main (child_num_arg=child_num_arg@entry=0) at prefork.c:707
        current_conn = 0x7f6cd8908d80
        csd = 0x7f6cd8908b90
        thd = 0x7f6cd8906b80
        osthd = 140105451198528
        ptrans = 0x7f6cd8908b18
        allocator = 0x7f6cd8906a10
        status = <optimized out>
        i = <optimized out>
        lr = <optimized out>
        pollset = 0x7f6cd8906fb8
        sbh = 0x7f6cd8906fb0
        last_poll_idx = 0
        lockfile = <optimized out>
#55 0x00007f6cccc72a55 in make_child (s=0x7f6cd841b340, slot=slot@entry=0) at prefork.c:810
        pid = 0
#56 0x00007f6cccc72ab6 in startup_children (number_to_start=5) at prefork.c:828
        i = 0
#57 0x00007f6cccc737c0 in prefork_run (_pconf=<optimized out>, plog=0x7f6cd8421358, s=0x7f6cd841b340) at prefork.c:986
        index = <optimized out>
        remaining_children_to_start = <optimized out>
        rv = <optimized out>
#58 0x00007f6cd7aa13ae in ap_run_mpm (pconf=0x7f6cd83f4138, plog=0x7f6cd8421358, s=0x7f6cd841b340) at mpm_common.c:94
        pHook = 0x7f6cd84a5e60
        n = 0
        rv = 0
#59 0x00007f6cd7a9a966 in main (argc=2, argv=0x7fff9b41d7e8) at main.c:777
        c = 68 'D'
        showcompile = 0
        showdirectives = 0
        confname = 0x7f6cd7ad88cf "conf/httpd.conf" 
        def_server_root = 0x7f6cd7ad88c4 "/etc/httpd" 
        temp_error_log = 0x0
        error = <optimized out>
        process = 0x7f6cd83f2218
        pconf = 0x7f6cd83f4138
        plog = 0x7f6cd8421358
        ptemp = 0x7f6cd841f348
        pcommands = 0x7f6cd8416248
        opt = 0x7f6cd8416338
        rv = <optimized out>
        mod = 0x7f6cd7cf7098 <ap_prelinked_modules+24>
        opt_arg = 0x7fff9b41df6f "FOREGROUND" 
        signal_server = <optimized out>

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[2015-12-18 02:55 UTC] laruence@php.net

-Status: Open +Status: Feedback

[2015-12-18 02:55 UTC] laruence@php.net

Thank you for this bug report. To properly diagnose the problem, we
need a short but complete example script to be able to reproduce
this bug ourselves. 

A proper reproducing script starts with <?php and ends with ?>,
is max. 10-20 lines long and does not require any external 
resources such as databases, etc. If the script requires a 
database to demonstrate the issue, please make sure it creates 
all necessary tables, stored procedures etc.

Please avoid embedding huge scripts into the report.

[2015-12-19 10:26 UTC] ta-sdz at deshammer dot net

-Status: Feedback +Status: Open

[2015-12-19 10:26 UTC] ta-sdz at deshammer dot net

Hi Laruence,


is there a slight possibility that the opcache.so does not check whether it is already loaded?


Reason:
======= 
I had a "zend_extension=opcache.so" in my php.ini as well as in my "/etc/php.d/10-opcache.ini"

This would lead to two opcache instances concurrently modifying the cache causing heap-havoc.

Had no more SIG11 since I removed the one in php.ini.

The debug machine is still open for you for to reproduce the crash as well as to reproduce the effect of removing the zend_extension=opcache.so in the php.ini.


Best regards and many thanks

[2015-12-19 23:17 UTC] rasmus@php.net

-Status: Open +Status: Duplicate

[2015-12-19 23:17 UTC] rasmus@php.net

Yes, we were missing that check for zend_extensions and it was fixed recently. It will be in 7.0.2. See https://bugs.php.net/bug.php?id=71089

[2015-12-20 02:46 UTC] laruence@php.net

Ah, that one, yeah, it was fixed.. thanks

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